Merge branch 'pcl'

.gitlab-ci.yml

CMakeLists.txt

common/cpp/CMakeLists.txt

common/cpp/include/ftl/config.h.in

common/cpp/include/ftl/utility/opencv_to_pcl.hpp

common/cpp/src/opencv_to_pcl.cpp

renderer/cpp/CMakeLists.txt

renderer/cpp/include/ftl/display.hpp

renderer/cpp/src/display.cpp